<template>
  <div>
    <div style="margin-bottom: 16px">
      <a-button type="primary" :disabled="!hasSelected" :loading="state.loading" @click="start">
        Reload
      </a-button>
      <span style="margin-left: 8px">
        <template v-if="hasSelected">
          {{ `Selected ${state.selectedRowKeys.length} items` }}
        </template>
      </span>
    </div>
    <a-table
        :row-selection="{ selectedRowKeys: state.selectedRowKeys, onChange: onSelectChange }"
        :columns="columns"
        :data-source="data"
    />
  </div>
</template>
<script setup>
import { computed, reactive } from 'vue';
const columns = [
  {
    title: 'Name',
    dataIndex: 'name',
  },
  {
    title: 'Age',
    dataIndex: 'age',
  },
  {
    title: 'Address',
    dataIndex: 'address',
  },
];
const data = [];
for (let i = 0; i < 46; i++) {
  data.push({
    key: i,
    name: `Edward King ${i}`,
    age: 32,
    address: `London, Park Lane no. ${i}`,
  });
}
const state = reactive({
  selectedRowKeys: [],
  // Check here to configure the default column
  loading: false,
});
const hasSelected = computed(() => state.selectedRowKeys.length > 0);
const start = () => {
  state.loading = true;
  // ajax request after empty completing
  setTimeout(() => {
    state.loading = false;
    state.selectedRowKeys = [];
  }, 1000);
};
const onSelectChange = selectedRowKeys => {
  console.log('selectedRowKeys changed: ', selectedRowKeys);
  state.selectedRowKeys = selectedRowKeys;
};
</script>